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From ma...@apache.org
Subject svn commit: r1366326 - /hadoop/common/branches/branch-1.1/src/docs/releasenotes.html
Date Fri, 27 Jul 2012 10:10:46 GMT
Author: mattf
Date: Fri Jul 27 10:10:46 2012
New Revision: 1366326

URL: http://svn.apache.org/viewvc?rev=1366326&view=rev
release notes for 1.1.0-rc2


Modified: hadoop/common/branches/branch-1.1/src/docs/releasenotes.html
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-1.1/src/docs/releasenotes.html?rev=1366326&r1=1366325&r2=1366326&view=diff
--- hadoop/common/branches/branch-1.1/src/docs/releasenotes.html (original)
+++ hadoop/common/branches/branch-1.1/src/docs/releasenotes.html Fri Jul 27 10:10:46 2012
@@ -94,6 +94,12 @@ dfs.datanode.sync.behind.writes - set to
 dfs.datanode.readahead.bytes - set to a non-zero value to trigger readahead for sequential
+<li> <a href="https://issues.apache.org/jira/browse/HDFS-2617">HDFS-2617</a>.
+     Major improvement reported by jghoman and fixed by jghoman (security)<br>
+     <b>Replaced Kerberized SSL for image transfer and fsck with SPNEGO-based solution</b><br>
+     <blockquote>                    Due to the requirement that KSSL use weak encryption
types for Kerberos tickets, HTTP authentication to the NameNode will now use SPNEGO by default.
This will require users of previous branch-1 releases with security enabled to modify their
configurations and create new Kerberos principals in order to use SPNEGO. The old behavior
of using KSSL can optionally be enabled by setting the configuration option &quot;hadoop.security.use-weak-http-crypto&quot;
to &quot;true&quot;.
 <li> <a href="https://issues.apache.org/jira/browse/HDFS-2741">HDFS-2741</a>.
      Minor bug reported by markus17 and fixed by  <br>
      <b>dfs.datanode.max.xcievers missing in</b><br>
@@ -796,6 +802,11 @@ dfs.datanode.readahead.bytes - set to a 
      <b>Fix performance regression in shuffle </b><br>
      <blockquote>There is a significant (up to 3x) performance regression in shuffle
(vs 0.20.2) in the Hadoop 1.x series. Most noticeable with high-end switches.</blockquote></li>
+<li> <a href="https://issues.apache.org/jira/browse/MAPREDUCE-4400">MAPREDUCE-4400</a>.
+     Major bug reported by vicaya and fixed by vicaya (performance, task)<br>
+     <b>Fix performance regression for small jobs/workflows</b><br>
+     <blockquote>There is a significant performance regression for small jobs/workflows
(vs 0.20.2) in the Hadoop 1.x series. Most noticeable with Hive and Pig jobs. PigMix has an
average 40% regression against 0.20.2.</blockquote></li>

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